Answer:
B. Thompson - Cathode Ray Tube/Plum Pudding
Explanation:
The scientist and the model/experiment that unintentionally discovered the electron was the Thompson's - Cathode Ray Tube/Plum Pudding.
Experiments on the discharge tubes was performed by J.J Thomson in 1897 and this led to the discovery of the electron as a subatomic particle.
The properties of the cathode rays were studied and presented by Thomson in his work at that time.
He observed that cathode rays move in a straight line normal to the cathode and can cast the shadow of an object placed along their path. They possess kinetic energy and so can cause the motion of a mechanical paddle wheel placed along their path They attract positive charges and repel negative charges.4.Identify each substance in the following word equation as a reactant or a product
limestone heat lime + carbon dioxide
5.What is the difference between an exothermic and endothermic reaction?
Explanation:
4. limestone heat lime + carbon dioxide
The reactants in this expression above is limestone
The products of the reaction is carbon dioxide and lime
Reactant is the species that gives the product and it is usually found on the left hand side of the expression.
The product is the substance on the right hand side of the expression that forms through the experiment.
Heat is used to facilitate the reaction.
5. An exothermic reaction is a reaction in which heat is given off.
An endothermic reaction is a reaction in which heat is absorbed in the process.
An exothermic reaction is always warmer after the reaction whereas an endothermic reaction is colder at the end of the reaction.
Please actually try when you answer. If you don't know the answer, don't answer and say that, I don't give a flip if you don't know the answer. How does a cell at the end of the first phase of the cell cycle differ from a cell at the end of the second phase?
Answer:
See the answer below
Explanation:
Knowing that the cell cycle has two phases
the first phase which is the interphase; andthe second phase, the m phaseA cell at the end of interphase would have grown in volume and have a doubled amount of DNA compared to the same cell at the end of m phase. Such a cell would also have more biochemical contents than its counterpart at the end of m phase.
The interphase is divided into;
G1 phase,S phase; andG2 phaseA cell at the end of m phase undergoes massive growth and development at the G1 phase, doubles its DNA at the S phase through replication, and synthesizes proteins at the G2 phase before hopping into the m phase again.
What is this and please explain why :)
What might happen if the strong force didn’t exist
Answer:
d
Explanation:
what are some of the relationships among thermal energy, kinetic energy, particle movement, and temperature?
Answer:
Temperature measures the average kinetic energy of the particles in a substance. Thermal energy measures the total kinetic energy of the particles in a substance. The greater the motion of particles, the higher a substance's temperature and thermal energy.
Explanation:
A substance’s total thermal energy depends on its temperature, the number of atoms, and physical state. More atoms and higher temperature mean more thermal energy. If all other conditions are the same, substances in gas form have the most thermal energy, followed by liquids, then solids.
Temperature can be measured with a thermometer. The matter inside a thermometer expands as its particles gain thermal energy and move.
Hope this helps!
Brain-List?
The kinetic energy of a body is associated with its motion and is dependant on its speed and mass. Similarly, thermal energy associated with a body increases its temperature more when it is moving.
What is kinetic energy?Kinetic energy is a form of energy generated by virtue of its motion. Kinetic energy is related with the mass m and speed v of the moving body by the expression below:
KE = 1/2 mv².
Thus, kinetic energy increases with an increase in mass and velocity of the body. When the particles are under motion with raised temperature, the molecules inside body overcome the energy barrier to move and aquire more kinetic energy.
Thus an in increase in thermal energy results in an increase in temperature of the body as well increase in kinetic energy. The overall change in both kinetic and thermal energy depends on the mass, speed of motion and temperature of the system.
To find more about kinetic energy, refer the link below:
https://brainly.com/question/12669551
#SPJ2
If the rate constant of a reaction is 0.010 L/mols at 30 °C, calculate the rate constant at 100 °C assuming the rate doubles for each 10 °C rise in temperature.
It says that the answer is 1.3 L/mols, but I don't understand why.
Answer:
1.3L/mols
Explanation:
At 30°C the rate constant is 0.010L/mols
As the rate doubles for each 10° rise in temperature:
At 40°:
0.010L/mols*2 = 0.020L/mols
At 50°C:
0.020L/mols*2 = 0.040L/mols
At 60°C:
0.040L/mols*2 = 0.080L/mols
At 70°C:
0.080L/mols*2 = 0.160L/mols
At 80°C:
0.160L/mols*2 = 0.320L/mols
At 90°C:
0.320L/mols*2 = 0.640L/mols
And at 100°C:
0.640L/mols*2 =
1.280L/mols ≅
1.3L/molsHow do organisms get energy from their environment?
Answer: They either eat other organisms or plants they take in the sun and water.
Which of the following is the correct definition of chemical energy?
A. energy stored in chemical bonds of molecules
B.
energy an object has because of its motion or position
C.
energy of an object due to the random motion of its atoms and molecules
D.
energy produced from the splitting of atoms
Answer:
A
Explanation:
energy stored in chemical bonds of molecules
what is a brine solution ?
Answer:
the aqueous solution of Naclis known as brine
What is the freezing point of Titanium?
Answer and Explanation:
The freezing point of Titanium is 1668 C or 3034.4 F...
The freezing point of Titanium (Ti) is 1668°C.
What is Titanium ?
Titanium is a chemical element. The symbol of titanium is Ti. Atomic number of Ti is 22. Electronic configuration of Titanium is [Ar] 3d² 4s².
What is Freezing point ?The temperature of a liquid which changes its state and becomes a solid is called as Freezing point. The freezing point of Titanium is 1668°C.
Thus from the above conclusion we can say that The freezing point of Titanium (Ti) is 1668°C.
Learn more about the Freezing point here: https://brainly.com/question/17048792
#SPJ2
Explain what happens during cytokinesis. This needs to be detailed.
Answer:
During cytokinesis, which is a physical process of cell division, the cells divide the cytoplasm of a parent cell into two daughter cells. The ring on the outside of the cell which is also known as a contractile ring, shrinks at the equator of the cell which causes pinching, and the plasma membrane goes inward. After all that happens there’s something called a cleavage furrow which is the formation of a dip between the two cells while they are splitting.
(You can sum it up, but I hope this helps!)
What is the weight of the water that is displaced by a floating object compared to the weight of the object?
Answer:
The amount of fluid displaced is directly related (via Archimedes' principle) to its volume. In the case of an object that sinks (is totally submerged), the volume of the object is displaced. In the case of an object that floats, the amount of fluid displaced will be equal in weight to the displacing object.
Explanation:
wikipedia
6
DO
Which are examples of a medium?
water and air
amplitude and wavelength
crests and troughs
compressions and rarefactions
Answer:
water and air
Explanation:
The examples of medium from this problem is water and air.
A medium is an agency or a means of propagating energy, waves or even facilitating a chemical reaction.
Fluids are very good medium in chemistry for chemical reactions. The two most common media used are air and water.
In physics, a vacuum is an empty space that has been evacuated. It also serves as a medium to study some physical phenomenon.
Answer:
a
Explanation:
please help me currently failing junior year
Answer:
option B
hope this helps :D
What is the atomic mass of aluminium?
5.00g of CaC12 in 95.0 g of water
Answer:
Explanation:
lo8
Which is the correctly balanced equation? *
A Ca + HCl → CaCl2 + H2
B Ca + HCl → CaCl2 + H2
cCa + H2Cl2 → CaCl2 + H2
D Ca + 2HCl → CaCl2 + H2
PLEASE ANSWER I WILL GIVE BRAINLIEST
Answer:
Ca + 2HCl → CaCl2 + H2
Explanation:
This ia balanced equation on both side 1 Ca and 2 H and 2 Cl are present
EASY POINTS GIVEN! WILL MARK BRAINLIEST:)
Answer:
faxs
Explanation:
Answer:
the first oneeeeeeeee
How many moles of Ca are in 3.75 x 1025 atoms of Ca? Group of answer choices 3.75 mol 0.016 mol 2.26 x 1049 mol 62.3 mol
Answer:
62.3 moles of Ca
Explanation:
1 mole of a substance is defined as 6.022x10²³ particles of this substance. For example:
1mol of electrons = 6.022x10²³electrons
1mol of atoms = 6.022x10²³atoms
1 mol of molecules = 6.022x10²³ molecules
And 1mol of atoms of Ca = 6.022x10²³ atoms of Ca
That means 3.75x10²⁵ atoms of Ca are:
3.75x10²⁵ atoms of Ca * (1 mole of Ca / 6.022x10²³ atoms) =
62.3 moles of Ca
Clyed made a diagram to compare characteristics of two kinds of plants
Answer:
maybe
Explanation:
you could be high risk for coronavirus if you have asthma and are not safe.
what gas is formed when zinc reacts with dilute hydrochloric acid
Answer:
Hope it helps.
Explanation:
When zinc reacts with hydrochloric acid it produces zinc chloride and hydrogen gas.
answers to student exploration : stoichometry (GIZMOS) WORTH 100 POINTS AND BRAINLIEST
please help me !!! im failing :(
Answer: H
H- C- H
H
Explanation:
Lewis structures are the structures which represent the valence electrons of the element around the chemical symbol of the element.
Carbon is an element which belong to group 14. Atomic number of carbon is 6 that means it contains 6 electrons, Thus the electronic configuration is represented as: [tex]1s^22s^22p^2[/tex] . Thus the valence electrons are 4.
Hydrogen is an element which belong to group 1. Atomic number of hydrogen is 1 that means it contains 1 electron, Thus the electronic configuration is represented as: [tex]1s^1[/tex] . Thus the valence electron are 1.
The four valence electrons of carbon are shared with one valence electron of hydrogen each.
Although no blueprints of the pyramids have been found, what evidence suggests humans, not aliens, built the pyramids?
The dog will eat more food to store fat and grow more hair.
The dog will lay in the sunlight to transpire
The dog will pant to circulate air throughout the body to cool
down
3.
The dog will grow a thick winter coat to keep warm during the
In the summer months, what is this dog's likely response to the rising temperatures?
summer
CLEAR ALL
hibernation exclamation mark
in this equation, what shows that transmutation has taken place?
PLEASE ANSWERR!
Answer:
B
Explanation:
I'm 99.9% sure that was the answer when I had this question last year
Answer:
C, the nucleus of an atom changes.
Explanation:
Ape.x
a single atom found on the periodic table is know as an
Answer:
Element
Explanation:
A chemical element is a substance that contains only one type of atom, which is the smallest particle of an element
1.
Acompound formed during the incomplete combustion of plastics shows the following percentage composition:
44.76%
1.25%H
44.05 % CI 9.94 % O
The molar mass is known to be 321.97 g/mol. Determine the empirical formula and the molecular formula for this compound
The empirical formula : C₆H₂Cl₂O
The molecular formula : C₁₂H₄Cl₄O₂
Further explanationGiven
The percentage composition
Required
The empirical formula and the molecular formula
Solution
The mol ratio of the components :
C : H : Cl : O
=44.76/12 : 1.25/1 : 44.05/35.5 : 9.94/16
=3.73 : 1.25 : 1.241 : 0.621 divide by 1.241
= 3 : 1 : : 1 : 0.5 x 2
= 6 : 2 : 2 : 1
The empirical formula : C₆H₂Cl₂O
(Empirical formula)n=molecular formula
(C₆H₂Cl₂O)n=321.97
(160.986)n=321.97
n=2
(C₆H₂Cl₂O)₂=C₁₂H₄Cl₄O₂
The molecular formula : C₁₂H₄Cl₄O₂
i need help asap plz
Answer:
Incorrect
Explanation:
Sodium has 11 atoms
Answer:
[tex]incorrect......[/tex]
help meeeeeeee??????????
Answer:
njjii
Explanation:
uujhhhjhhhthnjkk
